The World Weather Watch (WWW) is one of the crowning achievements of WMO. The celerity with which WMO responded to the introduction of meteorological satellites with the establishment of the WWW, and its subsequent adoption by all WMO Members, set a standard for international cooperation in operational programmes that remains unequalled today.

Theme: Seamless Prediction of the Earth System: from nowcasting through medium range to seasonal forecasts Weather prediction is achieving immense progress. Driven by research and by the development of ever more sophisticated infrastructure – in telecommunications, computerization and observation systems – predictive skill now extends, in some cases, beyond 10 days. Warnings of severe weather events are now issued many days in advance. Partly due to these advances, the needs of the users have simultaneously diversified, and now routinely encompass “environmental” prediction products related...

Weather and climate know no national borders. The transformation of the International Meteorological Organization into the World Meteorological Organization (WMO) in 1950 was an essential response to the need to strengthen global cooperation in this scientific area. In 1960, the Executive Council of WMO established World Meteorological Day to build public awareness of the services provided by National Meteorological Services and WMO. These services involve the observation, collection, processing and dissemination of meteorological, hydrological and other related data and products. The 23rd of...